What is mandatory metadata?

Title, author (except for CC0 or public domain) and license are mandatory information for the publication of a material on twillo. This information is minimum information for quality assurance, findability and the distinctiveness of the material from other works.

We strongly recommend that you describe your material with further information in addition to the mandatory information and provide comprehensive keywords. As a general rule, the more detailed the metadata, the easier it is for other teachers to find and assess the usability of your materials.